Spatial Straightness Error Evaluation Based on CDE
Aiming at the problem of low accuracy in spatial straightness error evaluation,an improved differential evo-lution algorithm based on spatial straightness error evaluation is proposed.Based on the product technical geometry specifi-cation(GPS)tolerance standard,the spatial straightness mathematical model is established by least square method.The dif-ferential evolution algorithm(DE)is added into Cubic chaotic mapping to initialize the population,and the variation factor and cross probability in the algorithm are improved.The simulation results show that the algorithm has improved conver-gence speed and accuracy to some extent.The error evaluation of two evaluation examples is studied.The results show that compared with HTMLBO,PSO,DE and ABC algorithms,CDE algorithm has more advantages in calculation accuracy,speed and stability.At the same time,when extracting the center coordinates of the section circle from the inner diameter of the same part,the optimal extraction points can effectively reduce the algorithm error.
万方数据
维普
